Door bell and alarm



June 27, 1939. D, BORLAND 2,164,029

DOOR BELL AND ALARM Filed April '7, 193s 2 sheets-smet 1 Ill-Uil WWI'- e-Zoas @caza/Vo June 27, 1939,

I D. BORLAND DOOR BELL AND ALARM Filed April 7, 1938 2 Sheets-Sheet 2 Patented June 27, 1939 UNITED STATES PATENT OFFICE y 2,164,029 Doon. BELL AND ALARM This invention relates to improvements in door bells and alarms and has special reference tol a door bell or alarm in which a turning movement of the door knob will ring a door bell, and in (ix which even a slight movement ol" the door knob will cause the bell to ring and announce the presence as of an intruder seeking to enter by stealth.

The objects of the invention are: VTo provide an alarm which will respond to such f minor movement of the door knob as will make it impossible for anyoneto tamper with the knob or effect entrance through the door without setting oi an alarm.

A further object of the invention is to make a door bell which is operated by turning, or

attempting to turn, the outer door knob.

The means by which the foregoing and other objects are accomplished, and the mannerv of their accomplishment will readily be understood from the following specifications on reference to the accompanying drawings, in which:

Fig. 1 is a side elevation, substantially full size, showing the outer and inner knob of a door.

Fig. 2 is a side elevation of the mechanism housed in the inner knob, the casing of the knob being cut away in section, and the view being approximately double size.

Fig. 3 is a corresponding sectional elevation on the same scale.

30 Fig. 4 is a sectional elevation taken as on the broken line IV-IV of Fig. 3, and on the same enlarged scale.

Fig. 5 is a sectional elevation on the broken line V- V of Fig. 3 looking in the opposite direction from the View shown in Fig. 4, likewise on the same enlarged scale.

Fig. 6 is a sectional elevation on the broken line VI--VI of Fig. 3, and

Fig. 7 a sectional elevation on the line VII-VII .of Fig. 3, these latter two views being on substantially the scale of Fig. 1.

Referring now to the drawings in which the Various parts are indicated by numerals:

II), is the outer door knob; II and I2 are hollow casing members forming the inner door knob, and I3 is the knob shaft which is secured to the outer door knob and extends through the door I4 into the inner knob. I5 is an inner escutcheon, and I6 the escutcheon plate, both of which latter are in usual manner solidly secured to the door. I1 is an annular member having a tapered and serrated end portion I8, adapted to t and frictionally engage within the escutcheon I5 to prevent turning. This annular member closely .-tls within and is secured to the shank I9 of the Hot Springs, Ark. 193s, serial No. 200,719 (C1. 11e-153) casing member II, thisshank being secured to the member as by welding, or if desired, being integral therewith, the annular member and casing member II being thus through the escutcheon I5, rigidly secured to the door.

26 is a sleeve secured on the shaft I3, this sleeve which may be interiorly squared to fit the shaft is secured thereto against longitudinal shifting and turning, as by a pin 2|. At its inner end the sleeve 20 is provided with teeth 22. 23 is a shiftable sleeve rotatably mounted on the shaft I3, this sleeve having teeth 24 adapted for inter-locking engagement with the teeth 22. The sleeve 23 is provided with a pair of annular grooves 26, 21. 28 is a detent carried by a bracket 29 suitably secured to the sleeve I1 and protruding therethrough into latching engagement as here shown with the groove 26, being resiliently urged into engagement therewith by a compression spring 30. The shiftable sleeve 23 is secured as by pins 3|, to a spindle 32 which spindle is in alinement with the shaft I3 and is rigidly secured to and adapted to be turned by the casing member I2. 35 and 36 are substantially cylindrical discs spaced apart and secured together by shouldered pins 31 and nuts 38 to form a frame. The disc 35 is secured as by screws 39 to lugs 40 which latter are secured in any usual or desired manner to the stationary casing member I I, the frame being in this manner secured against turning movement.

45 is a hollow spindle disposed around the spindle 32 and turnably mounted in the frame 35, 36. 46 is a ratchet wheel integral with the hollow spindle 45. 41 are crown teeth formed on the end face of this ratchet wheel and in the end of the spindle 45, which teeth are complementary to the teeth 25 of the sleeve 23 and are adapted to engage with these teeth when the sleeve 23 is shifted from engagement with the shaft sleeve 20 and the groove 21 is shifted into engagement with the pawl 28.

48 is a gear mounted on the hollow spindle 45 and turnable with respect thereto and to the ratchet Wheel 46. With this gear in place, the spindle 45 is assembled through central openings in the frame members 35, 36, and is secured by a split ring 49. 50 is a coil spring one end of which secured by a pin 5I to the hollow spindle 45 and the other by a post 52 to the frame member 36.

is a ratchet pawl which is pivotably secured to the gear 48 by a pin 56, and is urged by a spring 51 into engagement with the ratchet teeth of the ratchet 46. is a trip pivotably secured on the gear 48 by a pin 6I, this trip being held, by an extension of the spring 51, against a stop 62. 63 is a lug carried by the trip 60, which lug extends toward the end of the annular member I1.

is a detent oscillatably secured by a pin 1I to the flanged end 12 of the member I1. This detent has a portion or cam 13 adapted for engagement between the teeth 25 of the shiftable sleeve 23, these teeth being elongated so that this engagement may take place irrespective of the shift of the sleeve. The cam end 13 of the detent 18 is urged into engagement with the teeth 25 by a spring 14, and when in such position the end of the detent extends beyond the periphery of the flange 12 and into the path of the lug- 63 carried by the trip 50, thus blocking turning movement of the gear 48.

18 is a detent shoulder normally retracted within the circumference of the flange 12, but shiftable outward therebeyond on relative movement of the teeth 25 with respect to the cam 13, such shift moving the opposite detent end 15 within the circumference of the flange and releasing the lug 63 on the gear 48 but permitting same to move only to and against the shoulder 16.

The gear 48 meshes with a pinion 80 which is secured on a shaft 8I, journalled in a bracket 82, carried by the frame member 35 and is also journalled at its opposite end in the frame member 36. Also secured on the shaft 8| is a crown wheel 83 which cooperates with an anchor escapement 84 to actuate a bell clapper 85, the knob portion I2 serving as the bell. 86 is a shift lever having a handle portion 81 which extends through a slot 88 in the casing member II and is shiftable to cut off the alarm.

The nuts 38 are made of extra depth in order that they may serve as a retaining member limiting the unwinding of the spring 58.

In using the device the casing member I2 is retracted, shifting the spindle 32 and the sleeve 23 secured thereto. This movement diseng'ages the teeth 22 from the teeth 24 and shifts the groove 21 in the sleeve beneath the retaining pawl 28. The locking lever 86 is then. shifted by means of the handle portion 81 to prevent movement of the bell clapper 85 and, through the anchor escapement, of crown wheel 83. The casing member I2 is turned clockwise to wind up the spring 58 and after winding is completed is pushed in to re-engage the teeth 22, 24, and the device is ready for use, except that so long as the locking lever 86 is in locking position either knob may be used to open the door without ringing the bell. If, however, the locking lever be shifted to release the bell clapper the device becomes a door knob alarm or door knob bell. If now, the outer knob IU be turned to open the door, or be even slightly turned, movement of the shaft I3 shifts the anchor member and through the teeth 22, 24, turns the sleeve 23.

The teeth on the sleeve 23 force the cam 13 outward retracting the detent end 15 within the circle of the flange 12 and releasing the lug 63 carried by the gear 48, this release permitting the gear to turn until it engages the shoulder 18. Turn of the gear 48 in such movement accomplishes a complete turn of the pinion 80 and of the crown wheel 83, and through the anchor escapement 84 vigorously rings the bell. Further forward movement of the outer door knob or retractive movement of the door knob permits the cam 13 to again drop between the teeth 25 retracting the shoulder 16 and allowing the gear 48 to finish a complete turn and be checked at the end of such turn by the detent end 15.

Ringing of the bell occurring by any movement of the knob, it follows that the device is equally efficient as an alarm or as a door bell. Should the door latch parts (not shown) be locked against movement, the usual play, between the shaft I3 and these parts, allows sufficient turning movement of the shaft to accomplish tripping of the cam 'I3 by the teeth 25.

The above devices in no way interfere with the use of the knob to open the door, except that such use will set off the alarm. From the outside, the shaft I3 being turned by the outer knob the action is evident. On the inside, turn of the knob portion I2 turns the spindle 32, and the sleeve 23, pinned to this spindle. This motion is transmitted through the teeth 22, 24, to the sleeve 2D and through this sleeve to the shaft I3 accomplishing the same result.

Should it be desired to dispense with the alarm, as during the day, the lever 86 may be shifted to cut off bell movement.

The invention is not to be understood as restricted to the details set forth, except as they may be hereinafter set in any claim or claims.

I claim:

1. In an alarm for a door, an outer knob, an inner knob, comprising a stationary casing and a complementary turnable casing serving as a knob, said parts being hollow, a shaft secured to and extending from said outer knob to said stationary casing; a rst sleeve secured on the inner end of said shaft, said sleeve having clutch teeth on its inner end, an annular member around and journalling said sleeve, and means secured to said door embracing and securing said member and said stationary casing to said door; a frame xedly carried by said stationary casing, a second sleeve, axially alined with said shaft, journalled in said frame, means restraining axial movement of said second sleeve, said second sleeve having ratchet teeth therearound and clutch teeth on its shaft-proximate end, an actuating spring coiled about said second sleeve having its inner end secured to said second sleeve, and its outer end to said frame; a gear rotatably mounted on said second sleeve, said gear having a protruding lug, a ratchet pawl carried by said geariand a spring urging said pawl into engagement with said ratchet, a pinion engaging said gear, said pinion being secured to a shaft journalled in said frame, an escapement wheel secured on said shaft, an anchor escapement engaging said wheel and a bell clapper carried by said anchor escapement, and adapted for cooperation with said turnable casing as a bell, a spindle turnably and slidably mounted in said second sleeve and flxedly secured to said turnable casing, a spindle sleeve secured to and movable with said spindle, said spindle sleeve having clutch teeth on its opposite ends, shiftable respectively into engagement with said rst sleeve clutch teeth and said ratchet clutch teeth; a detent lever pivotally secured to said annular member, said lever having a cam end resiliently urged into operable engagement with the inner of said spindle sleeve clutch teeth, and a detent in latching engagement with said gear lug, said detent being shifted from engagement with said lug by movement of said spindle clutch teeth relatively to said cam.

2. In a door alarm, an outer knob, an inner knob, a shaft secured to and extending from said outer knob to said inner knob; a first sleeve secured on the inner end of said shaft, said sleeve having clutch teeth on its inner end, annular means around the journalling said sleeve, said means being secured to the door and including a stationary hollow casing portion and a complementary hollow turnable casing serving as a knob; a frame xedly carried by said stationary casing, a hollow spindle axially alined with said shaft, journalled in said frame, means restraining axial movement of said spindle, said hollow spindle having clutch teeth on its shaft proximate end, an actuating spring secured to said spindle and to said frame; a gear rotatably mounted on said spindle, said gear having a protruding lug, ratchet means coupling said gear and said spindle, an escapement Wheel carried by Said frame and driven by said gear, an anchor escapement engaging said Wheel and a bell clapper carried by said anchor escapement, and adapted for cooperation with said turnable casing as a bell, a solid spindle turnably and slidably mounted in said hollow spindle and xedly secured to said turnable casing, means secured to and movable with said solid spindle, said means having clutch teeth on its opposite ends, shiftable respectively into engagement with said rst sleeve clutch teeth and said hollow spindle clutch teeth; a lever pivotally secured to said annular means, said lever having a cam end resiliently urged into operable engagement with the inner of said spindle sleeve clutch teeth, and a detent in latching engagement with said gear lug, said detent being shifted from engagement with said lug by movement of said spindle clutch teeth relatively to said cam.

3. In a door bell alarm, an outer knob, an inner knob, and a shaft secured to and extending from said outer knob to said inner knob; a sleeve secured on the inner end of said shaft, said sleeve having clutch teeth adjacent its inner end, said inner knob being hollow and comprising stationary casing parts secured to the door and journalling said shaft, and a turnable casing part serving as a knob; a frame xedly carried by one of said stationary parts, a second sleeve axially alined with said shaft, journalled in said frame, means restraining axial movement of said second sleeve, said second sleeve having clutch teeth in its shaft proximate end, an actuating spring secured to said second sleeve and to said frame; a gear rotatably mounted on said second sleeve, said gear having a protruding lug, ratchet means coupling said gear and said second sleeve, an escapement Wheel carried by said frame and having driving coupling to said gear, an escapement engaging said wheel and a bell clapper actuated by said escapement, and adapted for cooperation with said turnable casing as a bell, a spindle turnably and slidably mounted in said second sleeve and fixedly secured to said turnable casing, means secured to and movable with said spindle, said means having clutch teeth on its opposite ends, shiftable respectively into engagement with said shaft clutch teeth and said sleeve clutch teeth; a lever pivotally secured on one o-f said stationary parts, said lever having a cam end resiliently urged into operable engagement with the inner of said spindle means clutch teeth, and a detent in latching engagement with Said gear lug, said detent being shiftable from engagement with said lug by movement of said spindle means clutch teeth relatively to said cam.

4. In a door alarm, an outer knob, an inner knob, a shaft secured to and extending from said outer knob to said inner knob', said inner knob including a stationary portion and a turnable portion, said portions being hollow and said turnable portion serving as a bell, said stationary portion supporting a stationary frame, said turnable portion having a rigidly attached spindle, rotatably mounted in said frame and shiftable into and out of turning engagement with said shaft; a bell clapper operably carried by said frame and cooperable with said turnable portion as a bell, spring actuated means carried by said frame, and spindle, adapted to operate said bell clapper, means carried by said frame for preventing operation of said clapper actuating mechanism, means actuated by said turnable knob portion for Winding said spring when said spindle is uncoupled from said shaft, and means operable by rotative movement of said shaft when in coupled engagement with said spindle for releasing said clapper operating mechanism.

5. In a door alarm, an outer knob, an inner knob, a shaft secured to and extending from said outer knob to said inner knob, said inner knob including a stationary portion and a turnable portion, said portions being hollow and said turnable portion serving as a bell, said stationary portion supporting a stationary frame, said turnable portion having a rigidly attached spindle, rotatably mounted in said frame and shiftable into and out of turning engagement with Said shaft; a bell clapper operably carried by said frame and cooperable with said turnable portion as a bell, spring actuated means carried by said frame and spindle, adapted to operate said bell clapper, means carried by said frame for preventing operation of said clapper actuating mechanism, means actuated by said turnable knob portion for Winding said spring when said spindle is uncoupled from Said shaft, means operable by rotative movement of said shaft when in coupled engagement with said spindle for releasing said clapper operating mechanism, and shiftable means for locking said bell clapper against movement.

' DELOSS BORLAND. 

